| Fier to Oegstgeest | 1,064.77 mi (1,713.59 km) |
| Fier to Oirschot | 1,006.73 mi (1,620.18 km) |
| Fier to Oisterwijk | 1,013.78 mi (1,631.52 km) |
| Fier to Oldebroek | 1,034.11 mi (1,664.25 km) |
| Fier to Oldenzaal | 997.77 mi (1,605.76 km) |
| Fier to Ommen | 1,022.61 mi (1,645.73 km) |
| Fier to Oosterend | 1,057.37 mi (1,701.67 km) |
| Fier to Oosterhout | 1,027.51 mi (1,653.62 km) |
| Fier to Oosterwolde | 1,050.44 mi (1,690.53 km) |
| Fier to Oostzaan | 1,063.63 mi (1,711.74 km) |
| Fier to Opmeer | 1,074.44 mi (1,729.15 km) |
| Fier to Oss | 1,012.41 mi (1,629.32 km) |
| Fier to Oud-Beijerland | 1,050.12 mi (1,690.01 km) |
| Fier to Oudenbosch | 1,035.85 mi (1,667.03 km) |
| Fier to Oudewater | 1,044.47 mi (1,680.91 km) |
